Surface bolt



A. C. HEINTZELIVIAN.

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UNETED STATES PATENT OFFICE.

ANDREW C. I-IEINTZELMAN, OF SOUTH. PASADENA, CAILFORNIA, ASSIGNOR TO EARLE HARDWARE MANUFACTURING COMPANY, A CORPORATION OF CALI- FORNIA.

SURFACE BOLT.

T 0 all to hom it may concern:

Be it known that I, ANDREW C. IIEINTZEL- MAN, a citizen of the United States, residing at South Pasadena, county of Los Angeles, State of California, have invented a new and useful Improvement Comprising a Surface Bolt, of which the following is a speci fication.

My invention relates to means for fasten ing doors and windows from the inside, and the principal object of the invention is to provide a bolt which can be cheaply pro duced from standard material and which will have a highly ornamental appearance when installed.

A further object is to provide a bolt in which the finish will not be marred or worn by the operation of the bolt.

Referring to the drawing which is for illustrative purposes only,

Figure 1 is an elevation showing the appearance of the device as installed on a door.

Fig. 2 is a side elevation with the base plate in section.

Fig. 3 is a view of the base plate as seen from the back.

Fig. 4: is a side elevation of the socket plate.

Fig. 5 is a section on a plane represented by the line 5-5 of Fig. 9..

In the form of my invention illustrated in these drawings 11 is a base plate which is preferably formed of sheet brass and which is provided with two lugs 12 having screw holes 13 therein and a screw hole 14 in the opposite end. The holes 13 and 14 are chamfered on their outer end so that the counter-sunk head screws may be used there in. The plate 11 is also provided with two slots 15 which are chamfered from'the opposite direction. A bar 20 is provided, this bar being preferably formed of semi-cylindrical brass rod having a flattened portion 21 at one end on which a knob 22 is secured. Two counter-sunk head iron screws 23 are secured in the bar 20, these screws being of proper size to slide in the slots 15. The bar 20 is shown in its retracted position by full lines in Fig. 2, being shown in its locked position by the dotted lines in that figure.

In practice the device is secured to the door 30 as shown in Fig. 1 and a strike 34: as shown in Fig. 4 is set into the casing of the door, this strike having an opening 35 into which the bar 20 can readily slide.

Specification of Letters Patent.

Patented Oct. 5, 1920.

Serial No. 341,549.

The socket plate is also provided with screw holes 86 so that it can be securely fastened 1n place. A small compression spring 40 is set into a drilled hole in the bar 20, this spring pressing against the base plate 11 to provide the necessary amount of friction to insure the bolt staying in place either when locked or retracted.

It will be noted that the various members are formed of standard material, and it will be further noted that the fastening'means between the bar 20 and the plate 11 are entirely on the back of the bar 20 so that there are no members projecting around the bar 20 to wear or impair the finish.

I claim as my invention 1. A locking mechanism for doors or the like comprising a strike and projecting beyond the inner surface of the door with the door closed, said strike having holes for screws and a semi-circular opening therein; a base plate having screw holes to take screws by which it may be secured to the surface of said door and provided with two slots these slots being chamfered with their greatest width next to the door; a bar formed of semi-cylindrical stock of suchsize and shape as to readily enter the opening in said strike one end of said bar being flattened; members carried 011 said bar and sliding in and engaging said slots; a knob secured to the flattened end of said bar; and a compression spring set in a recess in the flat side of said bar, said spring pressing against said base plate and providing a frictional lock to prevent accidental displacement of said bar.

2. A locking mechanism for doors or the like comprising a strike and projecting beyond the inner surface of the door with the door closed, said strike having holes for screws and a semi-circular opening therein; a base plate having screw holes to take screws by which it may be secured to the surface of said door and provided with two slots these slots being chamfered with their greatest width next to the door; a bar formed of semi-cylindrical stock of such size and shape as to readily enter the opening in said strike one end of said bar being flattened; members carried on said bar and sliding in and engaging said slots; and a knob secured to the flattened end of said bar.

3. A locking mechanism for doors or the like comprising a strike and projecting be screws and a semi-circular opening-therein;

a base plate having 'screw holes to take screws by which it may be secured to the surface of said door and provided with two slots these slots being chamfered with theirgreatest width-next, to the door; a bar formed of semi-cylindrical stock of such size and shape as to readily enter the opening 1n said strike one end of sald bar being flattened; members'carried on said bar and sliding in and engaging said slots; and a compress on spring set 1n a recess 1n the flat side of said bar, said spring pressing against sa d base plate and providing a frlctional lock to prevent accidental displacement of said bar.

4. A locking mechanism for doors or the like comprising a strike and projecting beyond the inner surface of the door with the door closed, said strike having holes for screws and a semicircular opening therein; a base plate having screw holes to take screws by'which it may be secured to the surface of said door and provided with two slots these slots being chamfered with their greatest width next to the door; a bar formed bf semi-cylindrical stock 'of such size and shape as to readily enter the opening in said strike and members carried on said barand sliding in and engaging said slots.

5. A locking mechanism for doors or the like comprising a strike and projecting beyond the inner surface of the door with the door closed, said strike having holes for screws and an opening therein; a base plate having screw holes to take screws by which it may be secured to the surface of said door and provided with two slots these slots being chamfere'd with their greatest width next to the door; a bar formed of stock of such size and shape as t'o readily' enter the cess in the flat side of said bar, said spring pressing against said base plate and providing a frictional lock to prevent accidental displacement of said bar.

6. A locking mechanism for doors or the hke comprlslng a strlke and prqectmg beyond the inner surface of the door with the door closed, said strike having holes for slots; and a knob secured to the flattened end of said bar. V r

7. A locking mechanism for doors or the hkecomprismg a strike and pro ect1ng beyond the inner surface of the door with the door closed, said strike having holes for screws and an opening therein; a base plate having screw holes to take screws by which it may be secured to the surface of said door and provided with two slots these slots being chamfered with their greatest width next to the door; a bar formed of stock of such size and shape as to readily enter the opening in said strike; members carried on said bar and sliding inand engaging said slots; and a compression spring set in a recess in the flat side of said bar, said spring pressing against said base plate and providing a frictional lock to prevent accidental displacement of said bar.

8. A locking mechanism for doors or the like comprising a strike and projecting beyond the inner surface of the door with the door closed, said strike having holes for screws and an opening therein; a base plate having screw holes to take screws by which it may be secured to the surface of said door andprovided with two slots these slots being chamfered with their greatest width next to the door; a bar formed of stock of such size and shape as to readily enter the opening in said strike and members carried on said bar and sliding in and engaging said 4 slots.

In testimony whereof, I have hereunto set ANDREW G. HEINTZELMAN. 

